Dear Expert,
I really need help with developing an investigation from my idea. For several weeks, I have been trying to find or think of a model that I could build or an experiment I could do to explain how lasers read CDs (I have a computer's CD drive that I could use in this assignment). Can you help me? I have no idea how to show how a laser reads a CD, and if you do, I would REALLY appreciate it if you told me!!!!
Thankyou,
Steff.
Computing Sciences and Engineering. HELP NEEDED URGENTLY!!!!
Moderator: berkeleywebs
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- Former Expert
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How CDs work
Hi Steff,
Take a look at http://www.howstuffworks.com/cd.htm to see if the information there works for you. Please let me know.
Take a look at http://www.howstuffworks.com/cd.htm to see if the information there works for you. Please let me know.
Cheers!
Dave
Science Buddies Mentor
Dave
Science Buddies Mentor
Steff,
Howstuffworks covers the cd reading process by a laser pretty nicely. There isn't a whole lot more to it really without going into semiconductor physics (if you want to learn about how to lay metals onto a substrate, for example).
I have found a couple more sites you might want to look at (they are actually not as detailed as Howstuffworks but may help you understand the concepts from a different angle):
http://www.thetech.org/exhibits/online/ ... sics2.html
http://www.scit.wlv.ac.uk/~c9727722/CDROM/CDRead.html
http://www.pcstats.com/articleview.cfm? ... 540&page=2
Shijun
Howstuffworks covers the cd reading process by a laser pretty nicely. There isn't a whole lot more to it really without going into semiconductor physics (if you want to learn about how to lay metals onto a substrate, for example).
I have found a couple more sites you might want to look at (they are actually not as detailed as Howstuffworks but may help you understand the concepts from a different angle):
http://www.thetech.org/exhibits/online/ ... sics2.html
http://www.scit.wlv.ac.uk/~c9727722/CDROM/CDRead.html
http://www.pcstats.com/articleview.cfm? ... 540&page=2
Shijun